Soil autotrophic and heterotrophic respiration respond differently to land-use change and variations in environmental factors

Hu, Shuaidong; Li, Yongfu; Chang, Scott X.; Li, Yongchun; Yang, Wenjia; Fu, Weijun; Liu, Juan; Jiang, Peikun; Lin, Ziwen

doi:10.1016/j.agrformet.2018.01.003

Cited by 46 publications

(14 citation statements)

References 67 publications

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“…The CO 2 from soil comes from the autotrophic respiration of plant roots and the decomposition of soil organic carbon by microbes (heterotrophic respiration). All the processes are regulated by soil organic carbon availability, root activity, microbes, soil and air temperature, and soil moisture content (Atarashi-Andoh et al 2012;Wu 2020;Hu et al 2018). Higher soil temperature and moisture content increase microbial activity (Qu et al 2020) and thus higher CO 2 emission rates.…”

Section: Introductionmentioning

confidence: 99%

Seasonal variation in soil CO2 emission and leaf gas exchange of well‐managed commercial Citrus sinensis (L.) orchards

et al. 2021

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Purpose To investigate whether soil clay content, cultivar and seasonal variation have any effect on soil CO2 emission rates and leaf CO2 assimilation rates in a drip-irrigated commercial Citrus sinensis orchard. Methods The study was carried out in the field as a randomised complete block design in a 2 × 2 factorial consisting of two soil types and two citrus cultivars on a drip-irrigated commercial Citrus sinensis orchards with 2-week interval measurements of soil CO2 emission and leaf gas exchanges for a year. Results Soil clay content did not influence plant CO2 assimilation rates and soil CO2 emission rates in irrigated citrus. However, seasonal variation significantly influenced both processes. Soil CO2 emission rates were highest in summer and were more than double the rates observed in winter while leaf CO2 assimilation rates were highest in autumn and four times higher than the winter season rates. Mean seasonal soil CO2 emission rates were strongly influenced by mean minimum seasonal temperatures while leaf CO2 assimilation rates only showed a relatively weak relationship with mean maximum seasonal temperatures. Conclusions Soil clay content did not influence soil CO2 emission and assimilation rates in drip irrigated citrus suggesting a non-significant effect of clay content for soils subjected to similar management practices. Citrus CO2 assimilation rate peaks in the autumn while soil CO2 emission rates peak in summer. A snapshot analysis of CO2 sequestration rates suggests that irrigated citrus orchards are net sinks of CO2 in summer, autumn and winter season.

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Section: Introductionmentioning

confidence: 99%

Seasonal variation in soil CO2 emission and leaf gas exchange of well‐managed commercial Citrus sinensis (L.) orchards

et al. 2021

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“…Land-use conversion can significantly affect the soil physicochemical and biological properties (Yang et al, 2004;Don et al, 2011;Moghimian et al, 2017). Over the past few decades, in order to gain higher economic benefits and to supply the growing demands of timber, paper and fuel, among other commodities, the conversion from natural forests to plantations is becoming more frequent (Burton et al, 2007;Li et al, 2014;Hu et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Effects of conversion from a natural evergreen broadleaf forest to a Moso bamboo plantation on the soil nutrient pools, microbial biomass and enzyme activities in a subtropical area

Cai

Lin

Penttinen

et al. 2018

Forest Ecology and Management

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Converting natural forests to plantations would markedly change soil physiochemical and biological properties, as a consequence of changing plant vegetative coverage and management practices. However, the effects of such land-use change on the soil nutrient pools and related enzymes activities still remain unclear. The aim of this study was to explore the effects of conversion from natural evergreen broadleaf forests to Moso bamboo plantations on the pool sizes and forms of soil N, P and K, microbial biomass, and nutrient cycling related enzyme activities. Soil samples from four adjacent evergreen broadleaf forest-Moso bamboo plantation pairs were collected from a subtropical region in Zhejiang Province, China. The soil organic C (SOC), total N (TN), total P (TP) and total K (TK) concentrations and stocks and different N, P and K forms were measured, and the microbial biomass C (MBC), microbial biomass N (MBN), microbial biomass P (MBP) and four soil enzymes (protease, urease, acid phosphatase and catalase) were determined. The results showed that converting broadleaf forests to Moso bamboo plantations decreased the concentration and stock of SOC but increased those of TK in both soil layers (0-20 and 20-40 cm), and such land-use change increased the concentration and stock of TN and TP only in the 0-20 cm soil layer (P < 0.05). This land-use conversion increased the concentrations of NH 4 +-N, NO 3-N, resin-P i , NaHCO 3-P i , NaOH-P i , HCl-P i , available K and slowly available K, but decreased the concentrations of water-soluble organic nitrogen (WSON), NaHCO 3-P o and NaOH-P o (P < 0.05). Further, this land-use change decreased the microbial biomass and activities of protease, urease, acid phosphatase and catalase (P < 0.05). In addition, the acid phosphatase activity correlated 3 positively with the concentrations of MBP and NaHCO 3-P o , and the activities of urease and protease correlated positively with the concentrations of MBN and WSON (P < 0.01). To conclude, converting natural broadleaf forests to Moso bamboo plantations had positive effects on soil inorganic N, P and K pools, and negative effects on soil organic N and P pools, and on N-and P-cycling related enzyme activities. Therefore, management practices that increase organic nutrient pools and microbial activity are needed to be developed to mitigate the depletion of organic nutrient pools after the land-use conversion.

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“…All comparisons occurred under both alternate wetting and drying: WET/DRY and continuous flooding: FLOOD. All regression lines are significant at p < 0.01. with CH 4 emissions could indicate higher C loss (Lu et al 2000;Hu et al 2018;Wu et al 2018). Moreover, given the decreased Fe 2+ in the soil solution under P fertilization, Fe 3+ could have occluded part of the applied P under any available oxic conditions in the soil, preventing immediate plant uptake.…”

Section: Discussionmentioning

confidence: 99%

Carbon allocation and fate in paddy soil depending on phosphorus fertilization and water management: results of ¹³C continuous labelling of rice

Atere

Zhu

et al. 2018

Can. J. Soil. Sci.

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We grew rice in phosphorus (P) deficient subtropical paddy soil in a field study and used 13CO2 continuous labelling to investigate photosynthetic carbon (C) partitioning and allocation under FLOOD versus WET/DRY conditions, with and without P fertilization (80 mg P kg−1). The plants and soil were sampled after each of three WET/DRY cycles to determine 13C allocation in above- and belowground plant biomass, microbial biomass, the rhizosphere, and bulk soil. Irrespective of water management, P-fertilized plants had higher biomass and P content and more total 13C in the rice-soil system, especially the 13C incorporation into the shoots (51%–96%), than samples without P fertilization. Root and bulk-soil 13C were largely independent of both P fertilization and water management. However, by the third sampling, P fertilization had increased the amount of 13C and microbial biomass 13C in the rhizosphere soil (RS) by 28% (WET/DRY) and 95% (FLOOD), and by 47% (WET/DRY) and 50% (FLOOD), respectively. The WET/DRY condition had significantly higher microbial biomass and 13C contents than FLOOD condition only in the RS. These results indicate that a well-established aboveground plant biomass following P fertilization is required to increase belowground C allocation. Thus, WET/DRY conditions, like FLOOD conditions, can provide moisture sufficient for unhindered P availability in rice-paddy system.

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Soil autotrophic and heterotrophic respiration respond differently to land-use change and variations in environmental factors

Cited by 46 publications

References 67 publications

Seasonal variation in soil CO2 emission and leaf gas exchange of well‐managed commercial Citrus sinensis (L.) orchards

Seasonal variation in soil CO2 emission and leaf gas exchange of well‐managed commercial Citrus sinensis (L.) orchards

Effects of conversion from a natural evergreen broadleaf forest to a Moso bamboo plantation on the soil nutrient pools, microbial biomass and enzyme activities in a subtropical area

Carbon allocation and fate in paddy soil depending on phosphorus fertilization and water management: results of ¹³C continuous labelling of rice

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Soil autotrophic and heterotrophic respiration respond differently to land-use change and variations in environmental factors

Cited by 46 publications

References 67 publications

Seasonal variation in soil CO2 emission and leaf gas exchange of well‐managed commercial Citrus sinensis (L.) orchards

Seasonal variation in soil CO2 emission and leaf gas exchange of well‐managed commercial Citrus sinensis (L.) orchards

Effects of conversion from a natural evergreen broadleaf forest to a Moso bamboo plantation on the soil nutrient pools, microbial biomass and enzyme activities in a subtropical area

Carbon allocation and fate in paddy soil depending on phosphorus fertilization and water management: results of 13C continuous labelling of rice

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Carbon allocation and fate in paddy soil depending on phosphorus fertilization and water management: results of ¹³C continuous labelling of rice